Have you even looked at it? Access is easy - just sign up. There isn't yet a comprehensive degree level program with it as it is rather new, having only been created less than 2 years ago.
As for classroom teaching, they're still working out the kinks. San Jose State did a test of the Intro to EE course and found that having the students get together and go over the materials in groups let to more of them passing the classes.
That said, the elite schools - MIT, Harvard, Penn State, Cal Tech, et al. will still be around 20 years from now. The high cost private schools and lower tier publics are in for a world of adjustment.
Did that study prove that classroom teaching was completely unnecessary? I would be interested to know exactly where you found it and whether or not it also found that having professors lecturing was necessary or not. The thing is, high schools and colleges are loaded with incapable teachers, so it is no surprise that some sill inevitably look to this to replace some of them. But as i said before, if an automated system could actually replace a high school or college teacher who truly does his or her job properly and effectively, then there are huge numbers of other jobs that system could just as easily replace and thereby become obsolete.
That said, it does seem like it will at least take a rather long time before an automated computer system of any kind can replace effective classroom teachers. Of course, they could be used to finally put some serious pressure on schools from K-1 through the grad level to actually have teachers who do the job correctly.